CN111803108A - Exposure control method and system based on clock synchronization - Google Patents
Exposure control method and system based on clock synchronization Download PDFInfo
- Publication number
- CN111803108A CN111803108A CN202010790991.3A CN202010790991A CN111803108A CN 111803108 A CN111803108 A CN 111803108A CN 202010790991 A CN202010790991 A CN 202010790991A CN 111803108 A CN111803108 A CN 111803108A
- Authority
- CN
- China
- Prior art keywords
- information
- exposure
- synchronization
- exposure mode
- detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/541—Control of apparatus or devices for radiation diagnosis involving acquisition triggered by a physiological signal
Abstract
The embodiment of the application relates to an exposure control method and system based on clock synchronization, wherein the method comprises the following steps: acquiring exposure mode information; determining corresponding synchronization parameter information based at least on the exposure mode information; controlling at least the detector and the radiation source to start action based on the synchronization parameter information.
Description
Technical Field
The present disclosure relates to the field of signal control technologies, and in particular, to an exposure control method and system based on clock synchronization.
Background
At present, DSA systems and DBT systems are medical imaging systems that use X-rays to realize imaging, and the core functions of the medical imaging systems are tomography and 3D image reconstruction. Further, in the DSA system, since it is no longer only a diagnostic apparatus, real-time continuous image capturing of various requirements during a surgical procedure is realized by sequential exposures at different frame rates.
In real-time continuous shooting, tomography and 3D reconstruction, higher requirements are made on the improvement of the shooting frame frequency, the elimination of image artifacts and the accuracy of the shooting follow-up signals (the accuracy and consistency of the exposure angle of CBCT and the reliability of ECG signal follow-up). Therefore, it is necessary to provide a more accurate and efficient exposure control method to improve the image quality of the image capturing.
Disclosure of Invention
One of the embodiments of the present specification provides an exposure control method based on clock synchronization, including: acquiring exposure mode information; determining corresponding synchronization parameter information based at least on the exposure mode information; controlling at least the detector and the radiation source to start action based on the synchronization parameter information.
One of the embodiments of the present specification provides an exposure control system based on clock synchronization, the system including: the exposure mode information acquisition module is used for acquiring exposure mode information; a synchronization parameter information determination module for determining corresponding synchronization parameter information based on at least the exposure mode information; and the synchronous action control module is used for controlling at least the detector and the ray source to start to act based on the synchronous parameter information.
One of the embodiments of the present specification provides a clock synchronization-based exposure control system, including: the main control unit is used for receiving exposure mode information; the clock synchronization unit is connected with the main control unit and used for receiving the exposure mode information and determining synchronization parameter information based on the exposure mode information, wherein the synchronization parameter information is used for controlling the execution unit to execute corresponding actions; wherein, the execution unit at least comprises a flat panel detector and a high voltage generator.
One of the embodiments of the present specification provides an exposure control apparatus based on clock synchronization, which includes a processor for executing the method for determining the operation position.
Drawings
The present application will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, in that, like numerals indicate like structures,
wherein:
FIG. 1 is an illustration of a method for exposure control based on clock synchronization, according to some embodiments of the present application
A sexual flow diagram;
FIG. 2 is a block diagram of an exposure control apparatus based on clock synchronization according to some embodiments of the present disclosure
A schematic diagram;
FIG. 3 is a block diagram of an exposure control system based on clock synchronization according to some embodiments of the present application
Schematic representation.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.
It should be understood that "system", "device", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
Although various references are made herein to certain modules or units in a system according to embodiments of the present application, any number of different modules or units may be used and run on a client and/or server. The modules are merely illustrative and different aspects of the systems and methods may use different modules.
Flow charts are used herein to illustrate operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.
One or more embodiments of the present application relate to an exposure control system based on clock synchronization, which can be used in various medical imaging systems to perform exposure control during photographing. The medical imaging system may include, but is not limited to, an angiography (DSA) system, a digital tomography (DBT) system, cone beam ct (cbct), and the like. The exposure control system based on clock synchronization in the embodiment of the application can provide a method for automatically determining the action start time and the action end time of each execution module (for example, a detector and a ray source) based on the exposure mode and/or a third party signal source so as to enable each execution module to act synchronously. In some embodiments of the present application, the detector may be a flat panel detector, or may be other detectors, and the present application is not limited thereto. For example, the flat panel detector in some embodiments of the present application may be replaced with a CCD detector. By way of example only, a DSA system is used for illustration: for example, DSA systems need to control a high voltage generator (i.e., a radiation source) to emit radiation to irradiate a lesion area of a patient and control a flat panel detector (i.e., a detector) to window to receive the radiation when exposing the lesion area of the patient. The exposure control system based on clock synchronization can determine the action time of the high voltage generator and the flat panel detector and control the high voltage generator and the flat panel detector to synchronously act, for example, the flat panel detector is controlled to open a window and simultaneously control the high voltage generator to emit rays.
In other embodiments, when the medical image system performs the exposure operation, the windowing operation may be performed on the flat panel detector, and then the high voltage generator is controlled to drive the bulb tube to emit the rays, so as to ensure that all the emitted rays fall into the flat panel detector, thereby avoiding the generation of artifacts during the shooting process. On one hand, the exposure time is long, and when the frame frequency of shooting per second is increased, the exposure method cannot meet the requirement of high-frequency shooting; on the other hand, the shooting signal firstly triggers the windowing operation, and the high-voltage generator is controlled to emit the rays after the windowing operation is finished, so that the best shooting opportunity may be missed when the flat panel detector collects the rays due to the delay of the operations of all parts, and the acquired image cannot reach the expectation. The exposure control system based on clock synchronization in the embodiment of the application can control the windowing operation and the ray emitting operation to be carried out simultaneously, so that the time of the whole exposure operation is saved, the influence of time delay among the operations is reduced, the shooting frame frequency is improved, and a high-quality image is obtained.
In the embodiment of the application, the exposure control system based on clock synchronization can also control the window closing starting time of the flat panel detector and the irradiation ending time of the high voltage generator, and the two operations are synchronously performed, so that all rays fall within the effective window opening range of the detector, and the artifact caused by the fact that the radioactive rays are in the irradiation state in the time period from the window closing starting time to the completion of the optical window of the flat panel detector is avoided.
The exposure control system based on clock synchronization of the embodiment of the application can also perform exposure control along with an external signal, namely when the external signal is triggered, the system can control the panel detector and the high-voltage generator to synchronously act with the external signal. For example only, during cone beam ct (cbct) imaging, exposure control may be performed according to the angle of gantry rotation, such as controlling the flat panel detector and the high voltage generator to perform one exposure for each 3 ° position of gantry rotation. The method can accurately control the shooting position of the image, and is beneficial to improving the reconstruction quality of the 3-dimensional image.
The exposure control system based on clock synchronization in the embodiment of the application can comprise a processing device and a terminal device. The terminal device may comprise a human machine interface in which a user of the terminal device may input user traffic. The user of the terminal device may be an operator of the medical imaging system. The user service refers to a specific task when the medical image system performs shooting. The processing device may obtain a user service from the terminal device, and determine the exposure mode information according to the user service. In some embodiments, the user refers to an operator of the exposure system, e.g., a medical professional.
The processing device may also determine synchronization parameter information based on the exposure mode information and output the synchronization parameter information to the execution unit for controlling the action of the execution unit. By way of example only, the processing device may include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), an Application Specific Instruction Processor (ASIP), a Graphics Processing Unit (GPU), a Physical Processing Unit (PPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), a programmable logic circuit (PLD), a controller, a micro-controller unit, a Reduced Instruction Set Computer (RISC), a microprocessor, or the like, or any combination thereof.
Fig. 1 is an exemplary flowchart of a method for exposure control based on clock synchronization according to some embodiments of the present application.
Step 110, exposure mode information is obtained. In some embodiments, step 110 may be performed by exposure mode information acquisition module 310.
In some embodiments, the exposure mode may be a manner in which the medical imaging system performs an exposure operation. In some embodiments, the exposure mode information may be parameter information related to an exposure operation of the medical imaging system. In some embodiments, the exposure mode information may include, but is not limited to, a photographing type, which may include photographing a 2D image or photographing a 3D image. In some embodiments, the exposure mode information may include a photographing frame rate, which may be the number of times an image is photographed per second. In some embodiments, the exposure mode information may include an exposure intensity used to control a radiation dose of the exposure. In some embodiments, the exposure intensity may not be included in the exposure mode information, but rather determined by a default value of a high voltage generator. In some embodiments, the exposure mode information may include an area to be exposed, where the area to be exposed is used to reflect and calculate an opening parameter of the beam limiting device, and the processing device may determine the opening parameter of the beam limiting device based on the area to be exposed, and send a control instruction to the beam limiting device to move the beam limiting device to an opening position corresponding to the area to be exposed. In some embodiments, the exposure mode information may not include the region to be exposed, and the opening parameter of the beam limiting device may be adjusted by an additional step, for example, by using a default value of the opening parameter of the beam limiting device.
In some embodiments, the exposure mode information may be determined according to user traffic. In some embodiments, the medical imaging system may include a human machine interface through which a user may input or select user services. In some embodiments, the processing device may obtain user traffic from the human machine interface and determine exposure mode information based on the user traffic. In some embodiments, the user service may be an image capturing process of a medical imaging system. In some embodiments, the image capturing process may be preset or may be set by a user. For example, the user service may be to capture a two-dimensional medical image of a target area, and the exposure mode information may include capture of a 2D image, exposure intensity, exposure duration, start time of exposure, end time of exposure, and the like. For another example, the user service may be to perform cone beam ct (cbct) photographing, and the exposure mode information may include a photographing type of a 3D image, an exposure intensity, an exposure duration, a photographing angle, and the like.
And step 120, determining corresponding synchronous parameter information at least based on the exposure mode information. In some embodiments, step 120 may be performed by synchronization parameter information determination module 330.
In some embodiments, the synchronization parameter may refer to a parameter related to an action performed by an execution module in the medical image system, which needs a synchronization action. In some embodiments, the synchronization parameter information may be information related to a synchronization parameter. In some embodiments, the synchronization parameters may include, but are not limited to, a starting state, an active state, a period, a frequency, a duty cycle, a number of periods, a phase difference, etc. of an execution module of the synchronization action. In some embodiments, the starting state may be the state in which the execution module was in when the action was initiated. In some embodiments, the valid state may be state information of whether the execution module is capable of valid actions. In some embodiments, the period may be the time required for the execution module to complete the last action to the next action. In some embodiments, the frequency may be the number of times per second that the execution module completes a complete action. In some embodiments, the duty cycle may be a ratio of an idle time to an active time of the execution module within a period. In some embodiments, the number of cycles may be the number of work cycles completed by the execution module throughout the shooting time. In some embodiments, the phase difference may be a difference in motion execution time of execution modules of the same frequency. In some embodiments, the synchronization parameters may further include time information when each component starts an action, time information when each component ends an action, interval time between adjacent actions, and the like. In some embodiments, the interval time between adjacent actions may be an interval time between a time when the component last ended an action and a time when the component next started an action.
In some embodiments, the processing device may calculate the synchronization parameter based on data in the exposure mode information. In some embodiments, the processing device may also determine the synchronization parameter based on data in the exposure mode information and an external signal calculation. In some embodiments, the processing device may determine system clock information from the synchronization parameter information. In some embodiments, the system clock information may be information related to a system clock. In some embodiments, the system clock may be a clock generated by the processing device within the system, which may reflect the trigger time of the system for performing the relevant action for each execution module, i.e., the system clock may reflect the action time of the system for each execution module.
In some embodiments, the synchronization parameter information may further include radiation intensity information of the radiation source, and the exposure control system may automatically determine the radiation intensity of the radiation source according to the exposure mode information. In some embodiments, the synchronization parameter information may not include radiation intensity information, and the radiation source may emit radiation according to a default radiation intensity of the device.
In some embodiments, the processing device may determine the synchronization parameter information through the exposure mode information input by the user, and the specific process thereof may be described in detail in step 122.
In some embodiments, the processing device needs to determine the synchronization parameter information according to the external information and the exposure mode information, and the specific process thereof can be described in detail in step 124 and step 126.
And step 122, determining corresponding synchronous parameter information based on the exposure mode information. In some embodiments, step 120 may be performed by synchronization parameter information determination module 330.
In some embodiments, the components of the medical imaging system that require synchronized motion may include the detector and the source of radiation. In some embodiments, the exposure mode information comprises capturing a 2D image, and the determining the corresponding synchronization parameter information based on the exposure mode information may comprise: and determining the synchronous action time of the detector corresponding to the ray source based on the shooting type in the exposure mode information. In some embodiments, the synchronized action time includes a start action time and an end action time of the respective execution module. The synchronous action of the detector and the ray source refers to that: the starting windowing time of the detector is synchronous with the starting paying-off time of the ray source; the time of completing the window closing of the detector is synchronous with the time of finishing the line releasing of the ray source. In some embodiments, the radiation source may be a high voltage generator and the detector may be a flat panel detector.
In some embodiments, the exposure control system may calculate the synchronization parameter based on the exposure mode information, and further determine a system clock according to the synchronization parameter, and the synchronization action time may be determined based on the system clock. In some embodiments, due to different performances of the detector and the radiation source, there may be delays of different durations between the detector and the radiation source, and the component with higher delay may act earlier, so that the time points of the actions performed by the detector and the radiation source are the same. Therefore, in some embodiments, the exposure control system may select a time from the system clock for each component as a preparation time, so as to control each execution module (e.g., the detector and the radiation source) to set a corresponding actual start time according to its own performance according to the synchronous time required by each execution module to execute synchronously, so as to ensure that the detector and the radiation source can act synchronously. Because the performance of each execution module is different, the start action has time delays of different durations, and the actual start time of each execution module is also different. The difference value of the actual starting time of each execution module is the phase difference between the modules.
In some embodiments, the exposure mode information may further include a shooting frame rate, the determining the corresponding synchronization parameter information based on the exposure mode information may further include determining a subsequent synchronization action time of the detector and the radiation source and an interval time of adjacent synchronization actions based on the shooting frame rate. In some embodiments, the subsequent synchronous action time may be understood as a plurality of synchronous action times corresponding to a plurality of different time points at which exposure operations are required to be performed in one exposure operation. The interval time of the adjacent synchronization actions may be understood as an interval time between a current synchronization action (e.g., a start time of the current synchronization action) and a next synchronization action (e.g., a start time of the next synchronization action) of each execution module (e.g., the detector and the radiation source). In some embodiments, the system clock may determine the time of the plurality of synchronization actions of each execution module and the time interval between two adjacent synchronization actions according to the synchronization parameter information. Wherein, the system clock can be understood as the action time of each execution module in the synchronous parameter information. In some embodiments, the actions of the various execution modules may also be controlled directly based on synchronization parameter information.
In some embodiments, the external information may be an external signal received by the exposure control system from a third party signal source. In some embodiments, the external signal may be a digital signal or an analog signal. In some embodiments, the exposure control system may be connected to an Electrocardiograph (ECG), and the exposure control system may obtain a signal output from the ECG, which may be understood as a beating signal of the heart. In some embodiments, the exposure control system may also be connected to a driving element, such as a motor, in a Cone Beam Computed Tomography (CBCT) system, and acquire a rotation angle signal of the motor, which may represent the shooting angle position information of the exposure frame.
In some embodiments, the processing device may obtain the external signal output by the third party signal source through a network or an electrical connection. In some embodiments, the processing device may shape the acquired external signal, converting it into a structured pulse signal.
Step 126, based on the external information and the exposure mode information, determining the corresponding synchronization parameter information. In some embodiments, step 130 may be performed by synchronization parameter information determination module 330.
In some embodiments, the photographing type in the exposure mode information includes photographing a 3D image. After the processing device acquires the external information, the processing device may determine synchronization parameter information based on the external information and the exposure mode information. Specifically, the processing device determines external follow-up information based on the external information, and then determines corresponding synchronization parameter information based on the external follow-up information and the exposure mode information.
In some embodiments, the processing device may learn the received external signal, the duration of which may be equal to the time of a plurality of cycles of the external signal, e.g., 5 cycles. In some embodiments, the processing device may enable following of the external signal after completing the learning of the external signal. In some embodiments, the following refers to synchronization of the system signal of the processing device with the external signal. In some embodiments, after the system signal is completed, the processing device may lock the system signal with the external signal to ensure that the two are always in synchronization. In some embodiments, the processing device may determine the system signal in the synchronized state as the external follow-up information. In some embodiments, the processing device may further automatically rectify the external follow-up information based on the change of the external signal, so that the system signal and the external signal can still be kept in a synchronous state when the external signal changes. Here, the external signal and the external information may be understood to have the same meaning.
In some embodiments, the extrinsic follow-up information may be used to determine synchronization parameter information for each execution model, e.g., to determine a start time and/or an end time of a detector and source synchronization action. Two specific examples are described in detail below.
In some embodiments, the external information may include heart beat information. In some embodiments, the heart beat information may reflect the state of the heart during beating, including whether the heart is in a contracted or expanded state. In some embodiments, the processing device may obtain heart beat information from an ECG. In some embodiments, the processing device may also process the heart beat information to determine corresponding heart beat following information. In some embodiments, when determining the heart beat following information, the law of the actual heart beat can be predicted through learning so that the heart beat following information can be synchronized with the actual ECG signal, so that the processing device can determine the synchronization time when the heart beat is in a certain specific state (for example, a contraction state) next time, so as to control the detector and the radiation source to synchronously act at the synchronization time, and further capture a plurality of exposure images when the heart is in the specific state (for example, the contraction state).
In some embodiments, the processing may include signal shaping, signal following, and signal locking. In some embodiments, the processing device may also determine synchronization parameter information based on the heart beat following information.
In some embodiments, the external information may include angular position information of the gantry. In some embodiments, the gantry may be used to support an imaging device of a medical imaging system, such as a radiation source or the like. In some embodiments, the angular position information of the gantry may reflect a capturing angle of a medical imaging system. In some embodiments, medical images taken at equiangularly spaced gantry angular positions can help to obtain higher quality three-dimensional reconstructed images.
In some embodiments, the processing device may obtain angular position information from a motor that controls rotational movement of the gantry. For example, the rotation angle of the motor shaft may be acquired by an encoder of the motor, and current angular position information corresponding to the gantry may be determined. In some embodiments, the processing device may also process angular position information of the gantry to determine corresponding angular position following information. In some embodiments, when determining the angular position following information, the position change rule of the actual gantry angle may be predicted through learning, so that the angular position following information can be synchronized with the actual gantry angular position change information, so that the processing device may determine a corresponding synchronization time when the gantry is at the next shooting angle, so as to control the detector and the radiation source to synchronously act at the synchronization time, and further shoot an exposure image when the gantry is at a plurality of shooting angles. The shooting angle is understood to be a predetermined angle at equal intervals to be shot, for example, starting from 0 ° when the frame is rotated by 180 °, and the shooting angle is determined when the frame angle is at each 3 ° increment position.
In some embodiments, the processing may include signal shaping, signal following, and signal locking. In some embodiments, the processing device may also determine synchronization parameter information based on the angular position following information.
And step 130, controlling at least the detector and the ray source to start to act based on the synchronous parameter information. In some embodiments, step 140 may be performed by the synchronous action control module 340.
In some embodiments, the processing device may generate an exposure synchronization signal for each component based on the synchronization parameter information. In some embodiments, the exposure synchronization signal may be used to control the components to synchronize during the exposure process. In some embodiments, the components may include, but are not limited to, a detector and a source of radiation. In some embodiments, the detector may be a flat panel detector. In some embodiments, the radiation source may include a bulb and a high voltage generator. In some embodiments, the processing device may further transmit the exposure synchronization signal to the detector and the radiation source, controlling the start or end of the motion.
In some embodiments, the processing device may control the detector and the radiation source to perform a synchronous action, where the detector is a flat panel detector, and the radiation source includes a high voltage generator and a bulb tube; in one example, the processing device may control the detector and the high voltage generator to act in synchronization. In some embodiments, the processing device may calculate synchronization parameter information based on the exposure mode information and determine a system clock based on the synchronization parameter. The processing equipment can control the flat panel detector to start windowing based on the synchronous action time of each execution module in the system clock time, and control the ray source to emit rays at the same time; more specifically, the processing device can control the flat panel detector to start the windowing action based on the synchronous action time of each execution module in the system clock time, and control the high-voltage generator to drive the bulb tube to emit rays at the same time. In some embodiments, the processing device may control the flat panel detector to start a window closing action and control the radiation source to stop emitting the radiation at the same time; more specifically, the processing device controls the flat panel detector to start a window closing action, and controls a high-voltage generator of the radiation source to drive the bulb tube to stop emitting the radiation at the same time. The mode can effectively compress the shooting time of single shooting and improve the shooting frame frequency, thereby improving the image quality. In some embodiments, the processing device may also control the flat panel detector to start the windowing operation first, and control the radiation source to emit the radiation at the time when the windowing operation of the flat panel detector is completed. The mode can avoid the phenomenon that during windowing, rays cannot completely irradiate the detection area of the flat panel detector to generate artifacts.
In some embodiments, the processing device may control the detector and the radiation source to perform a synchronization action based on the heart beat information, where the detector includes a flat panel detector, and the radiation source includes a high voltage generator and a bulb; in one example, the processing device may control the detector and the high voltage generator to perform a synchronized action based on the heart beat information. As an example, the processing device may determine a synchronization parameter based on the heart beat information and perform exposure control based on the synchronization parameter. In order to obtain a high quality image of the heart, it is often necessary to take multiple shots of the heart and reconstruct the shots. The processing device can control the flat panel detector and the high voltage generator to perform synchronous action at a time (for example, a beating start time) corresponding to a certain state of the heart based on the synchronous parameters, and the heart in the state is exposed to acquire an exposure image. Namely, the processing equipment controls the flat panel detector to execute windowing action at the time, and controls the ray source to emit rays to perform exposure operation; more specifically, the processing device controls the flat panel detector to perform a windowing action at the time, and controls the high-voltage generator to drive the bulb tube to emit rays. The processing device may further be adapted to re-expose the heart each time the heart beats to the state based on the synchronization parameter, obtaining a sequence of exposure images of the heart in the state. The medical imaging system can reconstruct a plurality of exposure image sequences of the heart to obtain a complete medical image of the heart. The exposure control method of the embodiment can accurately acquire the exposure image of the heart in a certain state, has no system delay, and is beneficial to improving the quality of the image.
In some embodiments, the processing device may control the detector and the radiation source to perform a synchronous action based on the angular position information of the gantry, where the detector is a flat panel detector, and the radiation source includes a high voltage generator and a bulb tube; in one example, the processing device may control the detector and the high voltage generator to perform a synchronization action based on angular position information of the gantry. As an example, in a CBCT system, when a medical image is taken, it is necessary to take a multi-angle shot (for example, a shot once per 3 ° rotation) of a subject and reconstruct a 3D medical image of the subject. The processing device may acquire angular position information of the gantry from a rotating motor of the gantry and may determine synchronization parameter information based on the angular position information of the gantry. The processing device may determine a system clock time corresponding to the gantry rotation angle based on the synchronization time information in the synchronization parameter information. The processing device can control each execution module to perform synchronous action based on the system clock time corresponding to the rotation angle position of the rack so as to acquire images at different shooting angles. The processing device may capture a plurality of angular positions to obtain a plurality of exposure image sequences. The medical imaging system can reconstruct a plurality of exposure image sequences to obtain a three-dimensional reconstruction image of a shot object. The exposure control method of the embodiment can accurately control the rotary shooting time of the CBCT, ensure that the images obtained by each shooting are all positioned at the required angle position, and avoid the shooting error caused by the system delay.
In some embodiments, the processing device may control the detector, the radiation source, and the beam limiting device to perform a synchronization action; here, the detector is a flat panel detector, and the radiation source includes a high voltage generator and a bulb tube; in one example, the processing device may control the detector, the high voltage generator, and the beam limiting device to operate in synchronization. In some embodiments, the processing device may calculate synchronization parameter information based on the exposure mode information and determine a system clock based on the synchronization parameter. In some embodiments, the processing device may control the beam limiting device to perform the blade adjustment based on a synchronization action time of the beam limiting device in a system clock time. In some embodiments, taking the detector as an example of a flat panel detector, the processing device may further control the flat panel detector to start a windowing operation at a time when the beam limiting device completes the adjustment of the blade, and control the radiation source to emit the radiation at the same time. In some embodiments, taking the detector as an example of a flat panel detector, the processing device may also control the time when the flat panel detector completes the windowing and the time when the beam limiting device completes the adjustment of the blade to be at the same time, and at this time, control the high voltage generator to drive the bulb tube to emit the radiation. In some embodiments, the synchronization parameter may further include an opening parameter of the beam limiting device, the opening parameter may represent a size of an opening of the beam limiting device, and the processing device may control the beam limiting device to perform the action based on the opening parameter. In some embodiments, the synchronization parameter may not include an opening parameter, which may be a default value or set in advance in the beam limiting device, and the beam limiting device may act according to the opening parameter.
It should be noted that the above description relating to the process 100 is only for illustration and explanation, and does not limit the applicable scope of the present application. Various modifications and changes to flow 100 will be apparent to those skilled in the art in light of this disclosure. However, such modifications and variations are intended to be within the scope of the present application. For example, in step 120, acquiring the external information may be omitted. As another example, all of the steps in the process 100 may be embodied in a computer readable medium comprising a set of instructions.
Fig. 2 is a schematic structural diagram of an exposure control apparatus based on clock synchronization according to some embodiments of the present application.
In some embodiments, the exposure control device 200 based on clock synchronization may include a main control unit and a clock synchronization unit. In some embodiments, the master control Unit may be implemented using a Micro Controller Unit (MCU). In some embodiments, the master control unit may also be implemented using other microprocessors, such as an ARM (advanced RISC machines) processor. In some embodiments, the main control unit may be configured to receive exposure mode information input by a user, configure an exposure control parameter, and perform exposure enabling control; optionally, the main control unit may also configure the exposure control parameter according to default exposure mode information.
In some embodiments, a clock synchronization unit may be connected to the main control unit, and configured to receive the exposure mode information and determine synchronization parameter information based on the exposure mode information, where the synchronization parameter information is used to control an execution unit to perform a corresponding action. In some embodiments, the clock synchronization unit may be implemented using a Field-Programmable Gate Array (FPGA) chip. In some embodiments, the execution unit may include, but is not limited to, a high voltage generator, a flat panel detector, a beam limiting device, and the like. In some embodiments, the main control unit may also monitor the input and output signals of the clock synchronization unit, so as to monitor the exposure control abnormality. In some embodiments, the clock synchronization unit may output a programmable exposure control signal to the execution unit. In some embodiments, implementing the clock synchronization unit using an FPGA chip may have the following benefits: the effective windowing time delay of the flat panel detector is not depended on, and all rays are ensured to fall within the effective windowing range of the flat panel detector in the aspect of system control; the limitation of the dynamic response capability of the system caused by the fact that the windowing time length of the flat panel detector is longer than the exposure time length is eliminated; the dynamic response performance of the system is improved, and the motion artifact is effectively eliminated; make the exposure control module, apparatus of the general type become possible; the exposure control flow is simplified, and the detection of exposure abnormity monitoring is optimized. In some embodiments, implementing the clock synchronization unit using an FPGA chip may also increase the exposure frame rate to 60-70 frames.
In some embodiments, the master control unit may include an exposure level controller and an exposure signal detector. In some embodiments, the exposure level controller may be used to perform data preparation and signal preparation. In some embodiments, the data preparation may include determining exposure mode information and exposure parameters. In some embodiments, the signal preparation may include determining whether an exposure hand brake signal is valid. In some embodiments, the exposure level controller may prepare data for input to the clock synchronization unit for synchronization parameter calculations. In some embodiments, the exposure level controller may input a signal ready to the high voltage generator to cause the high voltage generator to complete the pre-exposure preparation. In some embodiments, the exposure signal detector may be configured to monitor an input/output signal of the clock synchronization unit, so as to monitor an exposure control abnormality.
In some embodiments, the master control unit may further include an exposure mode input, which may obtain user traffic input from a human-machine interface of the medical imaging system. In some embodiments, the exposure mode input may also input the acquired user traffic to the exposure level controller, such that the exposure level controller may determine exposure mode information from the user traffic.
In some embodiments, the clock synchronization unit may include a clock signal generator, one or more pulse modulators. In some embodiments, the clock signal generator may be used to generate a system clock as well as synchronization parameters. In some embodiments, the pulse modulator may be used to generate exposure synchronization signals for the various components. In some embodiments, the clock generator may receive data preparations input by the master control unit and define the kind of synchronization parameter based on the exposure mode information and the exposure parameter. In some embodiments, the clock generator may generate a system clock based on the kind of synchronization parameter. In some embodiments, the clock generator may also receive external information from a third party signal source. In some embodiments, the external information is capable of determining the synchronization parameter information together with the exposure mode information. In some embodiments, the clock generator may further generate a system clock based on the exposure mode information and the external signal. In some embodiments, the clock generator may also determine synchronization parameters based on a system clock. In some embodiments, the clock generator may also output the synchronization parameter to a pulse modulator. In some embodiments, the pulse modulator may output a synchronization control signal based on the synchronization parameter. In some embodiments, the pulse modulators may be two, respectively for outputting synchronous control signals to the high voltage generator and the flat panel detector. In some embodiments, the number of pulse modulators may be three, and the pulse modulators are respectively used for outputting synchronous control signals to the high voltage generator, the flat panel detector and the beam limiting device. In some embodiments, the pulse modulator may be multiple in number, which may be determined by the number of components that require synchronous action.
In some embodiments, the exposure control device 200 based on clock synchronization may be applied to a medical imaging apparatus. In some embodiments, the present application further provides a medical imaging device that may include a radiation source, a detector, a master control unit, and a clock synchronization unit. The main control unit is used for receiving exposure mode information; the clock synchronization unit is connected with the main control unit and used for receiving the exposure mode information and determining synchronization parameter information based on the exposure mode information, wherein the synchronization parameter information is used for controlling the ray source and the detector to execute corresponding actions. In some embodiments, the medical imaging device may include, but is not limited to, an angiography machine (DSA), a direct digital radiography system (DR), an X-ray Computed Tomography (CT), a mobile C-arm, or a breast imaging device.
In some embodiments, referring to fig. 2, the clock synchronization unit may include an FPGA. In some embodiments, the FPGA may include a clock signal generator. In some embodiments, the clock synchronization unit may include a first pulse modulator electrically connected to the detector and a second pulse modulator electrically connected to the radiation source. In some embodiments, the clock synchronization unit may further include a third pulse modulator, a fourth pulse modulator, a fifth pulse modulator, and the like connected to other execution modules, which are not limited herein. For example a third pulse modulator connected to the beam limiting means. In some embodiments, the clock synchronization unit further comprises a clock signal generator electrically connected to the first and second pulse modulators, respectively.
In some embodiments, the radiation source may include, but is not limited to, a bulb and a high voltage generator. In some embodiments, the detector may be a flat panel detector, but may also be other detectors, such as a CCD detector or the like.
In some embodiments, referring to fig. 2, the master control unit comprises an exposure level controller and an exposure signal detector, which are electrically and/or communicatively connected to the clock synchronization unit, respectively.
In some embodiments, the medical imaging device further comprises a physiological state monitor, and the corresponding synchronization parameter information is determined based on external information provided by the physiological state monitor and the exposure mode parameter. In some embodiments, the physiological state monitor can provide a third party signal input or external information to the clock synchronization unit as a third party signal source. In some embodiments, the physiological state monitor may include, but is not limited to, an ECG, a pulse monitor, or a ventilator.
In some embodiments, when the medical imaging apparatus performs a medical imaging operation, the exposure control process of the medical imaging apparatus may specifically refer to the related description of fig. 1 in this application, which is not described herein in detail.
FIG. 3 is a block diagram of an exposure control system based on clock synchronization according to some embodiments of the present application.
As shown in fig. 3, the clock synchronization-based exposure control system 300 may include an exposure mode information acquisition module 310, an external information acquisition module 320, a synchronization parameter information determination module 330, and a synchronization action control module 340.
In some embodiments, the exposure mode information acquisition module 310 may be used to acquire exposure mode information.
In some embodiments, the external information acquisition module 320 may be used to acquire external information.
In some embodiments, synchronization parameter information determination module 330 may be configured to determine corresponding synchronization parameter information based at least on the exposure mode information. In some embodiments, the synchronization parameter information determining module 330 is further configured to determine a synchronization action time of the detector corresponding to the radiation source based on the shooting type in the exposure mode information. In some embodiments, the synchronization parameter information determination module 330 is further configured to determine a subsequent synchronization action time of the detector and the radiation source and an interval time between adjacent synchronization actions based on the shooting frame rate. In some embodiments, the synchronization parameter information determination module 330 is further configured to determine corresponding synchronization parameter information based on the external information and the exposure mode parameter. In some embodiments, the synchronization parameter information determination module 330 is further configured to determine corresponding heart beat following information based on the heart beat information; determining the synchronization parameter information based on the heart beat following information. In some embodiments, the synchronization parameter information determination module 330 is further configured to determine corresponding angular position following information based on the position information of the gantry; determining the synchronization parameter information based on the angular position following information.
In some embodiments, the synchronization action control module 340 may be configured to control at least the detector and the source of radiation to begin action based on the synchronization parameter information. In some embodiments, the synchronization motion control module 340 is further configured to control the detector, the radiation source, and the beam limiting device to start motion based on the synchronization parameter information.
The beneficial effects that may be brought by the embodiments of the present application include, but are not limited to: (1) the exposure control system based on the clock can adapt to different service requirements; (2) the exposure time of single exposure can be compressed, the shooting frame frequency is improved, and the image quality is improved; (3) the time delay caused by different characteristics of different parts in the exposure process is eliminated, and the image quality is improved. It is to be noted that different embodiments may produce different advantages, and in different embodiments, any one or combination of the above advantages may be produced, or any other advantages may be obtained.
Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be considered merely illustrative and not restrictive of the broad application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.
Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Moreover, those skilled in the art will appreciate that aspects of the present application may be illustrated and described in terms of several patentable species or situations, including any new and useful combination of processes, machines, manufacture, or materials, or any new and useful improvement thereon. Accordingly, various aspects of the present application may be embodied entirely in hardware, entirely in software (including firmware, resident software, micro-code, etc.) or in a combination of hardware and software. The above hardware or software may be referred to as "data block," module, "" engine, "" unit, "" component, "or" system. Furthermore, aspects of the present application may be represented as a computer product, including computer readable program code, embodied in one or more computer readable media.
The computer storage medium may comprise a propagated data signal with the computer program code embodied therewith, for example, on baseband or as part of a carrier wave. The propagated signal may take any of a variety of forms, including electromagnetic, optical, etc., or any suitable combination. A computer storage medium may be any computer-readable medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code located on a computer storage medium may be propagated over any suitable medium, including radio, cable, fiber optic cable, RF, or the like, or any combination of the preceding.
Computer program code required for the operation of various portions of the present application may be written in any one or more programming languages, including an object oriented programming language such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C + +, C #, VB.NET, Python, and the like, a conventional programming language such as C, Visual Basic, Fortran 2003, Perl, COBOL 2002, PHP, ABAP, a dynamic programming language such as Python, Ruby, and Groovy, or other programming languages, and the like. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any network format, such as a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet), or in a cloud computing environment, or as a service, such as a software as a service (SaaS).
Additionally, the order in which elements and sequences of the processes described herein are processed, the use of alphanumeric characters, or the use of other designations, is not intended to limit the order of the processes and methods described herein, unless explicitly claimed. While various presently contemplated embodiments of the invention have been discussed in the foregoing disclosure by way of example, it is to be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.
Similarly, it should be noted that in the preceding description of embodiments of the application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.
Claims (24)
1. An exposure control method based on clock synchronization, the method comprising:
acquiring exposure mode information;
determining corresponding synchronization parameter information based at least on the exposure mode information;
controlling at least the detector and the radiation source to start action based on the synchronization parameter information.
2. The method of claim 1, wherein the exposure mode information comprises taking a 2D image; the determining the corresponding synchronization parameter information based on the exposure mode information includes:
determining synchronous action time corresponding to the detector and the ray source based on the shooting type in the exposure mode information; wherein the synchronous action time comprises a start action time and an end action time.
3. The method according to claim 2, wherein the exposure mode information includes a photographing frame rate; the determining the corresponding synchronization parameter information based on the exposure mode information further comprises:
and determining the subsequent synchronous action time of the detector and the ray source and the interval time of the adjacent synchronous actions based on the shooting frame frequency.
4. The method of claim 1, further comprising:
acquiring external information;
the determining the corresponding synchronization parameter information based on at least the exposure mode information further comprises:
and determining corresponding synchronous parameter information based on the external information and the exposure mode parameter.
5. The method of claim 4, wherein the external information comprises heart beat information.
6. The method of claim 5, wherein the determining the corresponding synchronization parameter information based on the external information and the exposure mode parameter comprises:
determining corresponding heart beat following information based on the heart beat information;
determining the synchronization parameter information based on the heart beat following information.
7. The method of claim 4, wherein the external information comprises angular position information of a gantry.
8. The method of claim 7, wherein the determining the corresponding synchronization parameter information based on the external information and the exposure mode parameter comprises:
determining corresponding angular position following information based on the position information of the rack;
determining the synchronization parameter information based on the angular position following information.
9. The method of claim 1, wherein said controlling at least said detector and said source of radiation to begin an action based on said synchronized parameter information comprises:
controlling the detector, the ray source and the beam limiting device to start to act based on the synchronous parameter information; and the time for completing blade adjustment of the beam limiting device is the same as the pay-off time of the ray source.
10. An exposure control system based on clock synchronization, the system comprising:
the exposure mode information acquisition module is used for acquiring exposure mode information;
a synchronization parameter information determination module for determining corresponding synchronization parameter information based on at least the exposure mode information;
and the synchronous action control module is used for controlling at least the detector and the ray source to start to act based on the synchronous parameter information.
11. An exposure control device based on clock synchronization, comprising a processor, wherein the processor is configured to execute computer instructions to implement the method of any one of claims 1 to 9.
12. An exposure control system based on clock synchronization, the system comprising:
the main control unit is used for receiving exposure mode information;
the clock synchronization unit is connected with the main control unit and used for receiving the exposure mode information and determining synchronization parameter information based on the exposure mode information, wherein the synchronization parameter information is used for controlling the execution unit to execute corresponding actions;
wherein, the execution unit at least comprises a flat panel detector and a high voltage generator.
13. The system of claim 12,
the clock synchronization unit is further configured to receive external information from a third-party signal source, where the external information and the exposure mode information together determine the synchronization parameter information.
14. A medical imaging device comprising:
a radiation source;
a detector;
the main control unit is used for receiving exposure mode information;
and the clock synchronization unit is connected with the main control unit and used for receiving the exposure mode information and determining synchronization parameter information based on the exposure mode information, wherein the synchronization parameter information is used for controlling the ray source and the detector to execute corresponding actions.
15. The medical imaging device of claim 14, the clock synchronization unit comprising an FPGA.
16. The medical imaging device of claim 14, the FPGA comprising a clock signal generator.
17. The medical imaging device of claim 14, comprising a DSA, DR, CT, mobile C-arm, or breast imaging device.
18. The medical imaging device of claim 14, the radiation source comprising a bulb and a high voltage generator.
19. The medical imaging device of claim 14, the detector comprising a flat panel detector.
20. The medical imaging device of claim 14, the clock synchronization unit comprising at least a first pulse modulator and a second pulse modulator, the first pulse modulator electrically connected to the detector and the second pulse modulator electrically connected to the source of radiation.
21. The medical imaging device of claim 20, the clock synchronization unit further comprising a clock signal generator electrically connected to the first and second pulse modulators, respectively.
22. The medical imaging device of claim 14, the master control unit comprising an exposure level controller and an exposure signal detector, each electrically and/or communicatively connected to the clock synchronization unit.
23. The medical imaging device of claim 14, further comprising a physiological state monitor, the corresponding synchronization parameter information being determined based on external information provided by the physiological state monitor and the exposure mode parameter.
24. The medical imaging device of claim 14, wherein the physiological state monitor comprises an ECG, a pulse monitor, or a ventilator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010790991.3A CN111803108A (en) | 2020-08-07 | 2020-08-07 | Exposure control method and system based on clock synchronization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010790991.3A CN111803108A (en) | 2020-08-07 | 2020-08-07 | Exposure control method and system based on clock synchronization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111803108A true CN111803108A (en) | 2020-10-23 |
Family
ID=72863556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010790991.3A Pending CN111803108A (en) | 2020-08-07 | 2020-08-07 | Exposure control method and system based on clock synchronization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111803108A (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124144A (en) * | 1993-10-29 | 1995-05-16 | Hitachi Medical Corp | X-ray rotating stereoscopic radiography apparatus |
| CN1257693A (en) * | 1998-12-22 | 2000-06-28 | 通用电气公司 | Computerized cadiotomograph system |
| CN1448113A (en) * | 2002-03-29 | 2003-10-15 | 松下电器产业株式会社 | Image processing device and ultrasonic diagnostic device |
| US20040102693A1 (en) * | 2002-11-27 | 2004-05-27 | Jenkins John H. | Method and apparatus for automated selection of correct image for quantitative analysis |
| JP2006333898A (en) * | 2005-05-31 | 2006-12-14 | Canon Inc | Radiographic imaging system |
| CN101049243A (en) * | 2006-04-06 | 2007-10-10 | Ge医疗系统环球技术有限公司 | X-ray ct device |
| CN101375799A (en) * | 2007-08-29 | 2009-03-04 | 株式会社东芝 | X-ray computer tomography device and tomography method |
| US20100078583A1 (en) * | 2008-09-29 | 2010-04-01 | Fujifilm Corporation | Radiation image capturing system |
| JP2010075558A (en) * | 2008-09-26 | 2010-04-08 | Toshiba Corp | X-ray computed tomographic apparatus |
| CN102247157A (en) * | 2010-05-21 | 2011-11-23 | 株式会社东芝 | X-ray computed tomograohy apparatus |
| US20150139388A1 (en) * | 2013-11-15 | 2015-05-21 | General Electric Company | Heartbeat synchronized cardiac imaging |
| CN105615911A (en) * | 2014-10-20 | 2016-06-01 | 北卡罗来纳大学教堂山分校 | Systems and related methods for stationary digital chest tomosynthesis (s-DCT) imaging |
| CN107019517A (en) * | 2016-02-01 | 2017-08-08 | 上海优医基医疗影像设备有限公司 | X-ray multipotency imaging system and its image formation control method |
| US20180256123A1 (en) * | 2017-03-13 | 2018-09-13 | Konica Minolta, Inc. | Radiation image capturing system |
| US20180325411A1 (en) * | 2017-05-12 | 2018-11-15 | Canon Medical Systems Corporation | Medical image diagnosis apparatus |
| CN109730704A (en) * | 2018-12-29 | 2019-05-10 | 上海联影智能医疗科技有限公司 | A kind of method and system of control medical diagnosis and treatment equipment exposure |
| JP2019141114A (en) * | 2018-02-15 | 2019-08-29 | キヤノン株式会社 | Radiographic device, radiographic system, and control method of radiographic system |
| CN111467690A (en) * | 2020-04-14 | 2020-07-31 | 江苏瑞尔医疗科技有限公司 | Pulse exposure image acquisition system and method for double-flat-panel detector |
-
2020
- 2020-08-07 CN CN202010790991.3A patent/CN111803108A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07124144A (en) * | 1993-10-29 | 1995-05-16 | Hitachi Medical Corp | X-ray rotating stereoscopic radiography apparatus |
| CN1257693A (en) * | 1998-12-22 | 2000-06-28 | 通用电气公司 | Computerized cadiotomograph system |
| CN1448113A (en) * | 2002-03-29 | 2003-10-15 | 松下电器产业株式会社 | Image processing device and ultrasonic diagnostic device |
| US20040102693A1 (en) * | 2002-11-27 | 2004-05-27 | Jenkins John H. | Method and apparatus for automated selection of correct image for quantitative analysis |
| JP2006333898A (en) * | 2005-05-31 | 2006-12-14 | Canon Inc | Radiographic imaging system |
| CN101049243A (en) * | 2006-04-06 | 2007-10-10 | Ge医疗系统环球技术有限公司 | X-ray ct device |
| CN101375799A (en) * | 2007-08-29 | 2009-03-04 | 株式会社东芝 | X-ray computer tomography device and tomography method |
| JP2010075558A (en) * | 2008-09-26 | 2010-04-08 | Toshiba Corp | X-ray computed tomographic apparatus |
| US20100078583A1 (en) * | 2008-09-29 | 2010-04-01 | Fujifilm Corporation | Radiation image capturing system |
| CN102247157A (en) * | 2010-05-21 | 2011-11-23 | 株式会社东芝 | X-ray computed tomograohy apparatus |
| US20150139388A1 (en) * | 2013-11-15 | 2015-05-21 | General Electric Company | Heartbeat synchronized cardiac imaging |
| CN105615911A (en) * | 2014-10-20 | 2016-06-01 | 北卡罗来纳大学教堂山分校 | Systems and related methods for stationary digital chest tomosynthesis (s-DCT) imaging |
| CN107019517A (en) * | 2016-02-01 | 2017-08-08 | 上海优医基医疗影像设备有限公司 | X-ray multipotency imaging system and its image formation control method |
| US20180256123A1 (en) * | 2017-03-13 | 2018-09-13 | Konica Minolta, Inc. | Radiation image capturing system |
| US20180325411A1 (en) * | 2017-05-12 | 2018-11-15 | Canon Medical Systems Corporation | Medical image diagnosis apparatus |
| JP2019141114A (en) * | 2018-02-15 | 2019-08-29 | キヤノン株式会社 | Radiographic device, radiographic system, and control method of radiographic system |
| CN109730704A (en) * | 2018-12-29 | 2019-05-10 | 上海联影智能医疗科技有限公司 | A kind of method and system of control medical diagnosis and treatment equipment exposure |
| CN111467690A (en) * | 2020-04-14 | 2020-07-31 | 江苏瑞尔医疗科技有限公司 | Pulse exposure image acquisition system and method for double-flat-panel detector |
Non-Patent Citations (1)
| Title |
|---|
| 王浩文 等: "口腔锥形束CT同步曝光控制的设计及其验证", 生物医学工程学杂志, vol. 31, no. 6, pages 1283 - 1287 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3143935B1 (en) | Tomography apparatus and method of reconstructing tomography images | |
| JP4745161B2 (en) | Medical image capturing method and apparatus | |
| JP4928739B2 (en) | X-ray diagnostic apparatus and X-ray imaging method | |
| US8045677B2 (en) | Shifting an object for complete trajectories in rotational X-ray imaging | |
| JPH0732771B2 (en) | Device for reducing false images caused by periodic motion | |
| JP2007275314A (en) | X-ray ct apparatus | |
| JPH1189830A (en) | Radiation tomographic method and apparatus therefor | |
| JP2009078126A (en) | X-ray ct apparatus | |
| US11766231B2 (en) | System and method of image improvement for multiple pulsed X-ray source-in-motion tomosynthesis apparatus using electrocardiogram synchronization | |
| JP6416572B2 (en) | Method and apparatus for reducing artifacts in computed tomography (CT) image reconstruction | |
| EP2719332A2 (en) | Dual-energy cone-beam CT scanning | |
| CN109171775A (en) | Imaging method and scan control method, device, system, equipment and storage medium | |
| JP2016146904A (en) | Radiation diagnostic device | |
| JPWO2006077869A1 (en) | X-ray CT system | |
| CN111150419B (en) | Method and device for reconstructing image by spiral CT scanning | |
| WO2013047439A1 (en) | X-ray ct device and image correction method | |
| CN111803108A (en) | Exposure control method and system based on clock synchronization | |
| JP5280168B2 (en) | X-ray CT system | |
| JP2001161680A (en) | Method and apparatus for controlling quantity of x-ray irradiation during synchronized heart scanning | |
| JPS5937935A (en) | X-ray ct apparatus | |
| JP2012030089A (en) | X-ray diagnostic apparatus | |
| EP3082606B1 (en) | Projection data acquisition apparatus | |
| JP4996818B2 (en) | X-ray diagnostic equipment | |
| CN111358479A (en) | Acquisition parameter determining method and system for radioactive ray equipment | |
| US7646844B2 (en) | Method for operating a medical examination apparatus and an examination apparatus associated therewith |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 201807 Shanghai City, north of the city of Jiading District Road No. 2258 Applicant after: Shanghai Lianying Medical Technology Co., Ltd Address before: 201807 Shanghai City, north of the city of Jiading District Road No. 2258 Applicant before: SHANGHAI UNITED IMAGING HEALTHCARE Co.,Ltd. |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |